Weighing scale



July 3, 1928.

1,675,976 H. o. HEM

WEIGHING SCALE Filed Oct. 18. 1926 2 Sheets-Sheet 2 Patented `luly 3, 1928.

UNITED STATES PATENT OFFICE.

HALVOR O. HEM, OF TOLEDO, OHIO, ASSIGNOR TO TOLEDO SCALE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF NEW JERSEY.

WEIGHING SCALE.

Application filed October 18, 1926.

This invention relates to weighing scales, and more particularly to scales of the type in which the platform or commedity-receiver is supported upon the main lever at two points. Y

One of the principal objects of this invention is to improve the means employed for preventing the commocity-receiver from tipping when a load is placed adjacent one of its edges. f

Another object of my invention is to provide a simple and efficient stabilizing means fory scale platforms which is adaptable for use in scales having enclosed lever mechal5 nism, particularly those of the type employing only one platform supporting lever.

Still another object is the provision of a stabilizing means for a weighing scale platform in which the pressure on the pivots 2" and the consequent friction are reduced.

'And still another object is the provision of simple check link mechanism in the op eration of which there is set up no tendency of the load bearings to slide oVer theiry pivots.,

Other objectsand advantages will be apparentA from the following dcscription, in which reference is had to the accompanying drawings illustrating a preferred embodiment of my invention and wherein similar reference numerals designate similar parts throughout the several views.

In the drawings Figure I is a side elevational view of a Weighing scale embodying my invention, parts being broken away to show the mech anism and parts being shown in section;

Figure II is a top plan of the base of the scale, parts being removed for purposes of illustration Figure III is an enlarged sectional elevation on the line IIIe-III of Figure II;

Figure IV is a plan view on a further enlarged scale showing a pair of my check links and their pivots; and

Figure V vis a side elevational view of the parts shown in Figure IV and their supports. v

Referring to the drawings in detail, the scale of my invention comprises a base 1 upon one end of which is erected an upright housingy 2, and superimposed upon the latter is a substantially cylindrical casing 3 adapted to support and house a weight Serial No. 142,218.

indicating chart (not shown). Fixed to downwardly projecting bosses forming integral parts of the base 1 is a skeleton frame 5- provided with a pair of vertical projectlons 6 in the upper ends of which are mounted bearings 8 adapted to support the fulcrum pivots 9 of the main lever 10. The lever 10 is also provided with a pair of pivots 11 engaging the bearings 12 carried by the platform supporting structure or bracket 14. A pair of bosses 15 forming integral parts of the bracket 14 are bored to receive the studs 16, the latter supporting a grid or spider 17 upon which is mounted the commodity-receiver or platform 1S. The nose end 13 of the lever 1() is suitably connected by means of a stirrup 2O and fieXible ribbon 21 to some form of loadcounterbalancing means, as, for example, a pendu` lum or springs (not shown) to offset a load placed upon the platform 18. The loadcounterbalancing and indicating mechanism per se forms no part of the present invention and is not, therefore, shown or described. As is most clearly shown in Figure III, the skeleton frame 5 is provided with a pair of upwardly extending bosses 22, threaded into which is a pair of studs 28, the studs being adapted to be locked in adjusted position by lock nuts 2l. Secured by means of screws '25 to the upper ends of the studs 23 is a plate 26 having oppositely extending knife edges formed upon it. The oppositely extending knife edges of the plate 26 are engaged by the bearing blocks 27 which are pivoted between upper and lower members 28 of a push link and upper and lower members 29 of a pull link. The link members are spaced apart and the push and pull links connected by spacing bars 30 pivoted to the link members. The other ends of the links are also equipped with bearing blocks 27 which engage oppositely formed knife edgesl on another plate 31 which is secured by means of additional screws 25 upon the upper ends of bosses 32 formed upon the spider 17.

Elongated bosses 33 project downwardly from the skeleton frame 5 below the upwardly projecting bosses 22, and elongated bosses 34 project downwardly from the spider 17 below the upwardly projecting bosses 32, and knife edge plates 3G and 3T are secured on the lower ends of the bosses 33 and 34 and connected by push and pull links 38V and .39 similar in construction to those connecting the plates 26 and' 31.

j The vibration of the mechanism is damped members 38 under compression. TWhen a load-is placed adjacent the frontof the platform `the linkV members 28 are put under compression and the link members 39 Linder tension. SinceV the pressure on the knife edgesof the plates 26, 31, 36 and 37V caused by a load near the front or rea-r of the platform is divided between the upper. and lower combination, a frame, a lever having a ful.-

plates it is possible to place these plates much closer to the fulcrum and load pivots of the lever than would b e the case if the pressure were not so divided. It is possible to place Y these plates at a distance from the fulcrum k and load pivots equal to only half the length of the usualjspider stem. The platform 18 may, therefore, be placed comparativelyclose to the surface upon which thel scale rests and the-platform lever and check link mechanism may be enclosed in the relatively shallow, housing. n

The 'embodiment of my invention herein shown. and described is to be regarded as illustrative' onlyyand it is to be understood that the invention is susceptible to variation, modification and lchange within the spirit and scope of the subjoined claims.

Having described my invention, I claim:

'1.l In a device of the Vclass described, in combination, a frame, a lever fulcrumed thereon, said lever` having a load pivot, a

platform support carried thereby, andV check links connecting said platform support and'k said frame above and below said load pivot. 2.k Inz a devicex of the class described, in

combination, a frame, a lever fulcrumedV thereon, said leverzhaving a load pivot, a platform yspider carried by said load pivot,

said platform, spider having portions proV j ectingl upwardly and downwardly with respect to theload pivot and said frame having portions. projecting. upwardly and down; wardly with respect to the fulcium pivot of said lever, links connecting the yupwardly projecting portions of said spider andframe, and links connecting the downwardly pro# jecting portions of said spider and frame.

3.7In a` device of the class' described, in combination, a frame, a lever having a fulcrum pivot supported by said frame, `said lever having aI loadV pivot, a platform support carried, by said load pivot, push and pul1 .links pivotedto said frame and said platform l,support above said Vfulcruin and load pivots, and push and pull links pivoted to said frame Vand said platform support below said fulcruin and load pivots.

4. In a device of the class described, in i Lcombinatiomaframe, ag lever having a ful- 1 pull links extending between the knife edge plates secured to the upwardly and downwardly 'extending frame members and the Y knife edge plates secured to the upwardly and downwardly Aeitending members of said spider. Y

5. In a device ofthe class described, in

crum pivot supported by said frame, said leverhaif'ing a load pivot, a platform spider carried by said load pivot, said frameand platform spider having members extending upwardly and downwardly with respect to'Y said fulcrum and load pivots, links pivotvally connecting the Vupwardly extending members of said frame and spider, links pivotally connecting the downwardly extending members ofl said frame and' spider,

and a housing enclosing said lever and spider G. 'In a device of the class described, in.

combination, a frame, a lever having a ful-V Crum pivot supportedby said'frame, saidV lever having a loadpivot, a platform spider carried by said load pivot, said frame and platfromspider having members extending upwardly and downwardly with respect to saidfulcruin and load pivots, links pivotally'Y connecting the upwardly Vextending members of said frame and spider, llinks pivotally connecting the downwardly extending meinbers of said frame and spider, a housing enclosing said lever and spider, and 'means can ried by said spider and projecting upwardly hrough said housing for supporting a platorm.

7. In a'device of the class described, in

combination, a base housing, a frame secured therein, a lever having a fulcr-uni pivot supportedvon said frame, said lever `having a,

load pivot, a platform spider carried by said load pivot, lmembers on said" frame and spider projecting upwardly and downwardly v with respect to said fulcruin andload pivots, links pivotally connecting the upwardly projecting members on said frame and spider, vlinkspivotally connecting the downwardly projecting members on said frame and spi-V der, a cover plate for said base housing', and means on said spider extending upwardly through said housing for supporting a plat-v HALvoR l o. HEM.

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